Removing large LCD panels

[sintv]

Re: Removing large LCD panels

2 suction cups and put to the side of chassis - my bench is long enough for that. Before cups I had large piece if cardboard, Id lift a corner and slide the cardboard in.

[kiko1]

Re: Removing large LCD panels

https://www.youtube.com/watch?v=_-cKfX3WmSM

In this video we can see a chinese assembly factory of LCD TV. At minute 10:00 there's a contradictory view: first, a worker grabs a large LCD cell by hand and places it over a light table for testing, and after that, a machine with about 12 computer controlled small suction cups moves the cell over a pre-mounted backlight. Before that, it rotates 90 degrees to let a worker peel a protective sheet.

In attached picture we can see a cheap chinese tool with simple suction cups. Anyone uses this?

this ones are perfect...easily lifts 50" to 60" panels. Larger I did not try but I cannot see any problem.

[sigmeyer]

Re: Removing large LCD panels

I use the big double suction cup technique . Sometimes you will get like a circle mark on the screen if it has been on the for a long time, but it goes away in a short time. I always clean the sdie of diffusor that points to the leds , because it is known there for dust to settle. Also when putting back the screen , check for fitment on every corner , make sure the plastic saddle is clipped all the way around , and then you can put the bezzle on the screen. Pretty straight forward , i made a video showing the full process with some advices here and there , but i still havent posted it. Also i would prefer to have an air compressor nearby or some elctrical blower to clean before putting back the screen.

[zezone]

Re: Removing large LCD panels

Hello,

has anyone tried this method? The guy in the video uses duct tape to lift the panel. I want to change the LED strips on my 48" TV, but I don't have suction cups, and lifting the panel with my hands from below, like pizza, makes me very nervous.

https://youtu.be/pUIKa7QSEO8?t=264

[KYBOSH]

Re: Removing large LCD panels

https://www.youtube.com/watch?v=_-cKfX3WmSM

In this video we can see a chinese assembly factory of LCD TV. At minute 10:00 there's a contradictory view: first, a worker grabs a large LCD cell by hand and places it over a light table for testing, and after that, a machine with about 12 computer controlled small suction cups moves the cell over a pre-mounted backlight. Before that, it rotates 90 degrees to let a worker peel a protective sheet.

In attached picture we can see a cheap chinese tool with simple suction cups. Anyone uses this?

I believe the panel she is handling still has protective film on it. Possibly both sides. That film may give the LCD increased rigidity so I can be handled as shown. At 10:45 you can see the film being removed prior to being assembled into the display assembly.

[Chungalin]

Re: Removing large LCD panels

https://www.youtube.com/watch?v=_-cKfX3WmSM

In this video we can see a chinese assembly factory of LCD TV. At minute 10:00 there's a contradictory view: first, a worker grabs a large LCD cell by hand and places it over a light table for testing, and after that, a machine with about 12 computer controlled small suction cups moves the cell over a pre-mounted backlight. Before that, it rotates 90 degrees to let a worker peel a protective sheet.

In attached picture we can see a cheap chinese tool with simple suction cups. Anyone uses this?

[Storyteller12]

Re: Removing large LCD panels

I work by myself also with no help. And only broken screen with suction cups that failed.

Personally I don’t work on anything smaller than 50” as there’s just no money to be made for me.

Every screen is different. Some have no bezel and are glued. Some lift right out.

You just have to figure out what works best for you and what you’re comfortable with.

[Chungalin]

Re: Removing large LCD panels

I thought that my method of disassembling the panel with LCD screen looking down laying on the table was safe, until today. It’s very safe for disassembling, but reassembly can be catastrophic, because you don’t see how the LCD glass aligns with the backlight chassis guides. This is what has happened to a Samsung UE48JU6060K with a LSF480FN05-K04 LCD cell (attached image). When reassembling the TV, the glass was trapped by the black guide and cracked when pressed against the front bezel. Now that side of the screen is darker and has motion artifacts.

So now I face either to stop repairing anything that implies opening panels larger than 40" (which basically means leaving the business), or either to find another way to disassemble/reassemble them.

Suction cups seem to be risky and can produce mura effect or even break the glass due to excess of force. What do they use at factories to assemble the TVs? I guess that they use suction cups connected to a vacuum pump with controlled pressure.

What about a set of smaller and simpler suction cups attached to a structure?

I’m only interested in solutions that can be performed by a single person, because I work alone and nobody can help me. I’ve already ruled out TVs larger than 55", because I can understand that a single person cannot safely lift a 65" glass.

[Storyteller12]

Re: Removing large LCD panels

[QUOTE=KYBOSH;1193819]When you say you use your hands do you mean you lift it and grip it vertically (like a suitcase) or horizontally (like you would carry an extra extra large pizza)?

Both. Smaller screens up to 65” I can do like a “pizza” as you say. 75-86” I stand vertically and let them kinda fall out as I hold them.

[KYBOSH]

Re: Removing large LCD panels

I always use my hands and never broke a panel. I've done everything from 32” up to 86” LGs this way.
I broke 2 panels with suction cups and never again.
Just my 2 cents.

When you say you use your hands do you mean you lift it and grip it vertically (like a suitcase) or horizontally (like you would carry an extra extra large pizza)?

I have found that misting the screen with a little spray bottle before applying the suction cups help a lot. I also use the smaller cheaper suction cups. The quality gives the sweet spot for applying to screens. Too cheap to have a strong bond/suction that would damage the screen but just strong enough to stay attached with the aid of water and a clean surface. I got mine from Harbor Freight.

[Storyteller12]

Re: Removing large LCD panels

I always use my hands and never broke a panel. I’ve done everything from 32” up to 86” LGs this way.
I broke 2 panels with suction cups and never again.
Just my 2 cents.

[KYBOSH]

Re: Removing large LCD panels

I have jsed stav242's wooden brace method along with suction cups on several occasions each. Both have had instances where my heart skipped a beat when something was about to go wrong. Suction cups slip and or come off mid-lift. Wooden braces brush against delicate wires or film which protrude from the glass they are trying to support.

I like the looks of the back of the couch method though

[mainevail]

Re: Removing large LCD panels

I've made a wooden brace which ican adjust to fit the glass panel size , them use some decent blue tape (like decorators use) to stick this to the glass. Then can lift the panel fully supported off and stand on its edge. The wood brace is holding it off the surface slightly. Works well. Can swap the panel out quite easily.

Could you supply any photos of your wooden brace? Looking for ideas. Thanks

[dagav]

Re: Removing large LCD panels

I haven't had that problem but watched Nick's video where he said suction marks would clear up. The spots are probably on diffusers.

Do you have a link to the video?

[stav242]

Re: Removing large LCD panels

I've made a wooden brace which ican adjust to fit the glass panel size , them use some decent blue tape (like decorators use) to stick this to the glass. Then can lift the panel fully supported off and stand on its edge. The wood brace is holding it off the surface slightly. Works well. Can swap the panel out quite easily.

[dskall]

Re: Removing large LCD panels

I haven't had that problem but watched Nick's video where he said suction marks would clear up. The spots are probably on diffusers.

[William1967]

Re: Removing large LCD panels

Despite long inactivity in the thread, and not a answer to any of the previous posts, Im posting a similar problem that I recently experienced.
After replacing all backlights on a Samsung 55" UE55JU6875, I got blue marks and som blue dots in dark pictures, see attached picture. This is only visibel in dark pictures. Used suctioncups to lift of the screen, so the bowmarks is caused by this, but not the dots. Anyone have explanation on what causing this?

This looks like the spacers inside the panel have pressed against the panel under pressure, giving you such errors.

[dagav]

Re: Removing large LCD panels

Despite long inactivity in the thread, and not a answer to any of the previous posts, Im posting a similar problem that I recently experienced.
After replacing all backlights on a Samsung 55" UE55JU6875, I got blue marks and som blue dots in dark pictures, see attached picture. This is only visibel in dark pictures. Used suctioncups to lift of the screen, so the bowmarks is caused by this, but not the dots. Anyone have explanation on what causing this?

[bbruzzoni]

Re: Removing large LCD panels

I recently got some suction cups that are meant for lifting TV panels and the first 2 TVs I used them on they worked perfect, although I did feel that the suction appeared to be very strong. Nonetheless, since it worked I used them on the next TV. Worked fine, but when I finished fixing the backlights and picked up the panel, there was a slight crack sound. I inspected the TV and saw nothing, so I continued assembling it. When I turned it on, sure enough one of the suction cups cracked a circle on the panel... maybe the suction is too strong, maybe I lifted it too fast, I don't know.

[SLK001]

Re: Removing large LCD panels

One thing to add - resist the temptation of setting a panel directly on any form of carpet. It will attract stray fibers and lint like a magnet. Set the panel on a clean cotton towel and set the diffusers also on the towel in front of the panel (they are "attractive", too). Also, do not touch the panel or the diffusers with an unprotected hand. The oils in you hand will leave a mark that will have to be cleaned off. Wear a pair of cotton gloves, or even put a pair of cotton socks over your hand when you handle the panel.